schraube



(No Model.)

G. H. F. SGHR'ADER. SCREW STOPPER FOR WATER BAGS, m.

Patented Sept. 2?, 1892'.

FIG. 2.

FIG. I.

FIG. 7.

FIG. 6'.

WIN-mm INVENTOR:

WITNESSES By his AllOWZZyS, W ("3m C W Z/M YkE nmmzs vz'rtns cm, mom-ma,WASHINGTON, IL 1.x

UNITED STATES PATENT OFFICE.

GEORGE H. F. SGHRADER, OF NEW YORK, N. Y.

SCREW-STOPPER FOR WATER-BAGS, 80C.

SPECIFICATION forming part of Letters Patent No. 483,330, datedSeptember 27, 1892.

Application filed February 17,1892. fierial No. 421,850. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE E. F. SCHRADER, a citizen of the UnitedStates, residing in the city, county, and State of New York,haveinvented certain new and useful Improvements in Screw-Stoppers forWater-Bags, of which the following is a specification.

This invention provides an improved construction of screw-stopperadapted for closing the mouths 'of india-rubber water bags or bottlesand for other analogous uses. Screw-stoppers for this purpose asheretofore constructed have consisted, usually, of a cap or inverted cupwith a handle or loop of bent wire fixed to its top and screw-threadedexteriorly to screw into a thimble fixed in the neck of a bottle orscrew-threaded interiorly to screw upon the upwardly-protruding portionof a thimble. The packing to make a tight joint has consisted of a ringof indiarubber either set into the thimble or placed within the hollowcap when the latter has been externally threaded.

My invention provides an improved construction of externally-threadedstopper. Instead of forming the stopper as an inverted cup and leavingits bottom open I form the stopper with an inverted cup having a handleat top and a hollow body portion constructed, preferably, by applying adisk of metal or other suitable material to close the bottom of the cupand uniting it thereto by a suitable joint. To the middle of this diskor bottom is fixed a stud having an overhanging head, and 011 this studis placed an india-rubber packing-disk, which serves to make atightjoint with the thimble when the stopper is screwed in and has theadvantage over the rings heretofore used that it cannot come out or belost.

Figure 1 of the accompanying drawings is a fragmentary section of theupper or neck portion of an india rubber hotwater bag, showing thestopper in place. Fig. 2 1s a transverse section of the stopper. Fig. 3is an under side view or inverted plan thereof. Fig. 4 is a sectionalview showing the parts of the stopper before they are put together. Fig.5 shown in section the process of manufacturing the cup of the stopper.Fig. 6 is a sectional view showing a modified construction of stopperscrewed into its thimble.

Fig. 7 is a section showing all the parts of the stopper shown in Fig. 6before being put together. Fig. 8 is a sectional view of a furthermodified construction of stopper.

In Fig. 1 let A designate a hot-water bag or bottle of any usualconstruction, having a neck a and the usual f unnel-shaped mouth orguard a. In the neck a is cemented athimble B, as usual, this thimblebeing internally screw-threaded and having an internal flange 1) at thebottom.

0 is the stopper, which has an external screw-thread screwinginto theinternal screwthread in the thimble. The stopper is preferablyconstructed,as shown in Fig. 2, with a hollow body portion 0 and ahandle (Z, made of bent wire,\vith its ends thrust through holes in thebody of the stopper and spread and riveted down therein to tightlyattach it to the body. The body is constructed of a cup 6 (shown best inFig. 4:) and a bottom disk f,

the cup, which edge is swaged or turned down, so as to make a tightjoint, as shown inFig. 2. A stud h is tightly secured by riveting to thecenter of the disk f and before this disk is applied to the cup. Thehandle (Z is also riveted fast to the cup before the bottom disk isapplied thereto. The other parts being thus put together, a rubber diskt is attached to the bottom of the stopper by springing it over theoverhanging head of the stud h. This disk is preferably of a diameterequal to that of the bottom portion of the body of the stopper, so thatit covers the joint between the parts e and f. When the stopper isscrewed into the thimble, this disk is clamped tightly between thebottom of the body of the stopper and the internal flange b, so that itforms a water-tight joint, preventing the passage of water from the bagout between the body 0 of the stopper and the flange b. At the same timeit serves to pack the joint between the cup 6 and disk f. so that evenif this joint were not so tightly made as to be water-tight it would beimpossible for water to enter it. It is obviously desirable to preventany admission of water into the hollow.

of the body of the stopper, as if water were to enter here it would beliable to leak out around the riveted ends of the handle cl. Heretoforeit has been necessary 'to carefully solder inserted in the grooved orrabbeted edge 9 of around these riveted ends in order to make the capWater-tight, as the interior of the cap was in communication with thewater in the bottle; but by my invention this troublesome and annoyingsoldering operation is rendered unnecessary, since the water is notpermitted to enter the cup or body of the stopper.

The top of the stopper is preferably formed from plate-brass by theoperation of drawing in the manner shown in Fig. 5. A disk is firstformed, as shown at c, and this is then drawn into cup shape in adrawing-press, as shown at e This cup is then driven into a die tocontract its lower end, as shown at a Thereupon it is put into a latheand turned down to the shape shown in Fig. 4, cutting screw-threads uponits exterior and leaving thelower portion j thereof denuded of threadsto serve as a guide to assist in introducing the stopper into thethimble and in starting the screw-threads aright. This method ofconstruction, however, is not essential to my invention, as the cup maybe formed in many other ways.

Internalstoppers, or those having external screw-threads which screwinto a thimble, are greatly to be preferred to those in the form of acap which screws upon the upwardlyprotruding end of a thimble, for thereason that with the latter construction of thilnble part of the waterpoured into the funnel a, fails to run into the bag, but remains aroundthe thimble, and also because this construction makes the metal portionsat the mouth of the bag of nearly twice the length as when an internalstopper is employed.

Internal stoppers for water-bottles as here tofore made have beensubject to the objections of the use of an india-rubber ring forpacking, which could not be permanently attached to either the thimbleor the stopper, and which was consequently liable to be misplaced andlost, and also of the difficulty of making a tight joint where the endsof the handle are inserted, it being necessary to employ the greatestcare in soldering and carefully test each stopper after soldering toinsure its being tight. overcomes these difticulties and enables theadvantages of an internal stopper to be fully realized. The constructionof the means for closing the open lower end of the inverted cup tocomplete the hollow body of the stopper may be therefore varied withoutdeparting from my invention. Figs. 6 and 7 show a stopper made of twocup-shaped parts of sheet metal, having rolled threads andscrewed theone into the other to the bottoms of their threads, the upper one beingthe inverted cup, to which is riveted the handle, and the lower one thedisk closing the lower open end of the cup and carrying the stud to jointhe disk to the inverted cup. The outer cup or disk has its ends swageddown upon the inner or inverted cup. As here shown, the up per cup m isscrewed into the lower one m to form the body (lettered c) and the upperend My present invention "m of the outer cup is turned down upon theupper cup to hold. the two solidly together. The stud, here lettered h,is applied to the bottom of the lower cup. The construction of thethimble B is not changed, except that the screw-threads upon itsinterior are made of sinuous outline to conform to the roll of the metalthreads on the stopper.

Fig.8 shows a modification wherein the body a" is formed of two cups,the inverted cup being the upper and outer one a, to which the handle isattached, being provided with out wardly-rounded' corners a and thelower cup 10, of thinner sheet metal, serving as the disk on which thestud h is fixed, is forced into the upper cup, so that its edge shall bedeflected by the rounded corners e and caused to curve outwardly thereinin the act of forcing the two together, whereby the two cups are firmlyconnected to form the body.

I claim as my invention the following-defined novel features,substantially as hereinbefore specified, namely:

1. A screw-stopper for water-bottles, having a hollow body formed as aninverted cup having a handle at its top and having its bottom closed bya disk united to the edges of the cup, said disk formed with a centralstud for holding the packing-disk, and a washer sprung over said studand lying against said disk and extending over the face of the latterand the lower edge of said cup, substantially as and for the purpose setforth. 7

2. A screw-stopper for water-bottles, having a hollow body formed as aninverted cup-and its bottom closed by a disk having its periphery unitedto the edges of the cup by swaging them together to form awater-tightjoint.

3. A screw=stopper for watevbottleshaving too a hollow body formed as aninverted cup and a stud seating against and closing the open end of saidcup, engaging the rabbet thereof and secured thereto, and a perforatedwasher adapted to be sprung over said stud and lie against said disk.

5. A screw-stopper for water-bottlesconsist ing of an inverted hollowcup having a handle at top, externally scre w threaded, and having anannular lower edge constructed with a rabbet, in combination with asubstantiallyfiat disk having a stud riveted to its center andconstructed with a beveled outer edge fitting within the rabbet of saidcup, closing the open end thereof, and adapted when the edge of said cupis turned against the beveled edge of said disk to be thereby secured tosaid cup to form a hollow body, and a washer IIO sprung over said studand lying against said disk and the lower edge of said cup, whereby saidwasher overlies and protects the joint between said cup and disk.

5 6. A screw-stopper for water-bottles, consisting of a sheet-metal cupE, externally screwthreaded, having a lower cylindrical portionj,oonstituting a guide for introducing the stopper into its thimble, andan annular groove 9 10 on the inner wall of its lower edge, incombination with the disk f, carrying headed stud h, fitting within saidannular groove and held therein by the overturned lower edge of the cup,and washer i, sprung over said stud h of GEORGE II. F. SCHRADER.

Witnesses:

GEORGE H. FRASER, CHARLES K. FRASER.

